Bhagavad-Gita primary story is a concern with the war between two forces good versus evil in spite of that Arjuna's was concern about participating is because he had to fight with his own brothers(Kaurav), teacher(Dronacharya) and grandfather (Bhishma Pitamah).
He was also concerned because this war will lead to the death of his loved once.
Krishna told Arjuna that those who are on the side of Evil are also Evil irrespective of the relation so, to protect the world he should fight.
The conditions were different because germany had to pay millions of dollars due to the treaty of Versailles.Japan was different because they signed an alliance with Great Britain after WW1
If you wanted to be a dairy farmer, I’d suggest working in the country. If you’re making a milk company or something, you could do it in either the city or country.
